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diff --git a/libjava/classpath/gnu/javax/crypto/pad/PadFactory.java b/libjava/classpath/gnu/javax/crypto/pad/PadFactory.java
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+/* PadFactory.java --
+   Copyright (C) 2001, 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
+
+This file is a part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at
+your option) any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
+USA
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version.  */
+
+
+package gnu.javax.crypto.pad;
+
+import gnu.java.security.Registry;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * A Factory to instantiate padding schemes.
+ */
+public class PadFactory
+    implements Registry
+{
+  /** Collection of padding algorithm names --cached for speed. */
+  private static Set names;
+
+  /** Trivial constructor to enforce Singleton pattern. */
+  private PadFactory()
+  {
+    super();
+  }
+
+  /**
+   * Returns an instance of a padding algorithm given its name.
+   *
+   * @param pad the case-insensitive name of the padding algorithm.
+   * @return an instance of the padding algorithm, operating with a given block
+   *         size, or <code>null</code> if none found.
+   * @throws InternalError if the implementation does not pass its self-test.
+   */
+  public static final IPad getInstance(String pad)
+  {
+    if (pad == null)
+      return null;
+
+    pad = pad.trim().toLowerCase();
+    if (pad.endsWith("padding"))
+      pad = pad.substring(0, pad.length() - "padding".length());
+    IPad result = null;
+    if (pad.equals(PKCS7_PAD) || pad.equals(PKCS5_PAD))
+      result = new PKCS7();
+    else if (pad.equals(TBC_PAD))
+      result = new TBC();
+    else if (pad.equals(EME_PKCS1_V1_5_PAD))
+      result = new PKCS1_V1_5();
+    else if (pad.equals(SSL3_PAD))
+      result = new SSL3();
+    else if (pad.equals(TLS1_PAD))
+      result = new TLS1();
+    else if (pad.equals(ISO10126_PAD))
+      result = new ISO10126();
+
+    if (result != null && ! result.selfTest())
+      throw new InternalError(result.name());
+
+    return result;
+  }
+
+  /**
+   * Returns a {@link Set} of names of padding algorithms supported by this
+   * <i>Factory</i>.
+   *
+   * @return a {@link Set} of padding algorithm names (Strings).
+   */
+  public static final Set getNames()
+  {
+    if (names == null)
+      {
+        HashSet hs = new HashSet();
+        hs.add(PKCS5_PAD);
+        hs.add(PKCS7_PAD);
+        hs.add(TBC_PAD);
+        hs.add(EME_PKCS1_V1_5_PAD);
+        hs.add(SSL3_PAD);
+        hs.add(TLS1_PAD);
+        hs.add(ISO10126_PAD);
+        names = Collections.unmodifiableSet(hs);
+      }
+    return names;
+  }
+}